The RTD XTR105 is a 4-20mA current transmitter with sensor excitation and linearization features. It has low offset drift, low output current noise, high PSR, and high CMR. It is suitable for applications such as industrial process control, factory automation, SCADA remote data acquisition, and remote temperature and pressure transducers.
The XTR105 is a single‑chip 4‑20 mA current transmitter designed for platinum RTD temperature sensors and bridge circuits. It integrates two 800 µA precision current sources, a voltage‑to‑current converter, and second‑order linearization that typically yields a 40:1 improvement in linearity. The device operates from a wide supply range of 7.5 V to 36 V and is offered in DIP‑14 and SO‑14 packages.
Typical applications include industrial process control, factory automation, SCADA remote data acquisition, and remote temperature or pressure sensing. The XTR105 provides low offset drift (0.4 µV/°C), low output current noise (30 nA), and high common‑mode rejection (≥86 dB), making it suitable for high‑accuracy measurement systems.
| Supply voltage range | 7.5 V to 36 V |
|---|---|
| Output current range | 4 mA to 20 mA |
| Precision current source value | 800 µA each |
| Operating temperature range | –40 °C to +85 °C |
| Low offset drift | 0.4 µV/°C |
| Output current noise | 30 nA |
| Common‑mode rejection | ≥86 dB |
The XTR105 operates from 7.5 V up to 36 V.
It contains two precision current sources, each providing 800 µA.
The built‑in linearization circuitry typically gives a 40:1 improvement in linearity.